Sentence examples for were most challenging from inspiring English sources

Ocular surface cells were most challenging cells for oxidative stress, direct contact with the airflow, and light exposure including ultraviolet irradiation.

What was most challenging?

Which image was most challenging to make?

T.T.: What is most challenging about modeling?

But which is most challenging to sing?

What was most challenging about the role?

What's been most challenging and engaging about this project?

Which of your roles has been most challenging?

What's been most challenging about running your company?

Which ones are most challenging to you or your customers?

So which has been most challenging for you and why?